3 doctors weighed in:

Three cups of black coffee before my fasting blood test. Potassium came in at 5.7. Could this be the cause. I'm healthy otherwise.

3 doctors weighed in
Dr. Orrin Ailloni-Charas
Anesthesiology
1 doctor agrees

In brief: No.

Have the test repeated.
Blood cells can break down and release potassium. If the specimen was drawn in a way that traumatized the red blood cells, or if it sat around a long time before being tested, it will have an artificially high potassium.

In brief: No.

Have the test repeated.
Blood cells can break down and release potassium. If the specimen was drawn in a way that traumatized the red blood cells, or if it sat around a long time before being tested, it will have an artificially high potassium.
Dr. Orrin Ailloni-Charas
Dr. Orrin Ailloni-Charas
Thank
Get help from a real doctor now
Dr. Keegan Duchicela
Board Certified,
12 years in practice
16M people helped
Continue
111,000 doctors available